crud 自适应高度不太好用

crud 自适应高度，不太好用，我使用了两种方式都无法实现固定表头滚动
方式1 crud 外面包个容器，该容器固定高度，无法满足固定表头滚动数据
方式2 给表格直接写一个高度也没法满足要求

希望crud 至少能支持一种模式

Start by reproducing the CRUD behavior using both approaches described: a fixed-height outer container and a height set directly on the table. Read the CRUD and table height/scroll configuration entry points to determine which supported mode can provide a fixed header with scrolling data. Done means one documented configuration reliably keeps the header fixed while the data scrolls.

Written by the indexing model from the issue text.